User Manual

ATA Command Description

5-4 CompactFlash

5.1.4. Format Track—50H

Table 5-6. Format Track

Bit -> 7 6 5 4 3 2 1 0

Command (7) 50H

C/D/H (6) 1 LBA 1 Drive Head (LBA 27-24)

Cyl High (5) Cylinder High (LBA 23-16)

Cyl Low (4) Cylinder Low (LBA 15-8)

Sec Num (3) X (LBA 7-0)

Sec Cnt (2) Count (LBA mode only)

Feature (1) X

NOTE: The Format Track command in Table 5-6 is no longer recommended. The command is supported to

guarantee backward compatibility.

This command writes the desired head and cylinder of the selected drive with an FFh pattern. To remain host

backward compatible, the CompactFlash Memory Card expects a sector buffer of data from the host to follow the

command with the same protocol as the Write Sector(s) command although the information in the buffer is not used

by the CompactFlash Card. If LBA=1 then the number of sectors to format is taken from the Sec Cnt register

(0=256).

5.1.5. Identify Drive—ECH

Table 5-7. Identify Drive

Bit -> 7 6 5 4 3 2 1 0

Command (7) ECH

C/D/H (6) X X X Drive X

Cyl High (5) X

Cyl Low (4) X

Sec Num (3) X

Sec Cnt (2) X

Feature (1) X

The Identify Drive command enables the host to receive parameter information from the CompactFlash Memory

Card. This command has the same protocol as the Read Sector(s) command. The parameter words in the buffer have

the arrangement and meanings defined in Table 5-8. All reserved bits or words are zero. Table 5-8 is the definition

for each field in the Identify Drive Information.

Table 5-8. Identify Drive Information

Word Address Default Value

Total

Bytes

Data Field Type Information

0 848AH 2 General configuration bit-significant information

1 XXXX 2 Default number of cylinders

2 0000H 2 Reserved